Global patent index - EP 0988773 A1

EP 0988773 A1 2000-03-29 - LOUDSPEAKER ARRAY FOR ENLARGED SWEET SPOT

Title (en)

LOUDSPEAKER ARRAY FOR ENLARGED SWEET SPOT

Title (de)

LAUTSPRECHERANORDNUNG ZUR VERGRÖSSERUNG DES IDEALEN PUNKTES

Title (fr)

ENCEINTE ACOUSTIQUE PERMETTANT D'AMPLIFIER LE POINT IDEAL

Publication

EP 0988773 A1 (EN)

Application

EP 98924945 A

Priority

  • US 9810865 W
  • US 4782497 P

Abstract (en)

[origin: WO9854926A1] The invention is a method of creating an enlarged listening sweet spot for multiloudspeaker audio reproduction. The method employs a plurality of audio drivers (52, 56) displaced generally in a horizontal dimension for a vertically oriented head of a listener (60), the drivers operating over a plurality of different passbands (42, 46). Higher frequency drivers (55, 59) are located closer to one another and displaced more towards a center line of the listening space than lower frequency drivers (53, 57), thereby causing a smaller change in acoustic ear signals for listeners (60) seated away from the designed-for listening position, but without causing increased low frequency signal capacity requirements for phantom images generally outside the array (50). Specially adapted signal processing accounting for the layout of the various drivers and their associated crossover networks (40) is employed to create desired audio images.

IPC 1-7 (main, further and additional classification)

H04R 5/00; H04R 5/02; H04S 1/00

IPC 8 full level (invention and additional information)

H04R 5/02 (2006.01); H04S 1/00 (2006.01)

CPC (invention and additional information)

H04R 5/02 (2013.01); H04R 1/26 (2013.01); H04R 2205/022 (2013.01); H04R 2205/024 (2013.01); H04R 2499/15 (2013.01); H04S 3/002 (2013.01); H04S 2420/01 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9854926 A1 19981203; AU 7699998 A 19981230; CA 2290518 A1 19981203; CA 2290518 C 20070703; EP 0988773 A1 20000329; EP 0988773 A4 20060111; JP 2002500844 A 20020108

INPADOC legal status

2015-04-29 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20141118

2006-08-30 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20060801

2006-01-11 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20051124

2006-01-11 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- IPC: H04R 5/00 19680901AFI19990223BHEP

2006-01-11 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- IPC: H04R 5/02 19680901ALI20051119BHEP

2006-01-11 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- IPC: H04S 1/00 19800101ALI20051119BHEP

2000-03-29 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19991224

2000-03-29 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-03-29 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Free Format Text: AL PAYMENT 19991224;LT PAYMENT 19991224;LV PAYMENT 19991224;MK PAYMENT 19991224;RO PAYMENT 19991224;SI PAYMENT 19991224